East Side No. 3 Reservoir Report
Nearby: East Side No. 2 Nichols No. 2
Last Updated: December 5, 2025
East Side No.
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Summary
3 is a privately owned irrigation dam located in Converse, Wyoming, along the Five Mile Creek. Built in 1966 by designer L.C. Bishop, this earth dam stands at a height of 25 feet and has a storage capacity of 200 acre-feet. With a spillway width of 50 feet, the dam has a significant hazard potential due to its poor condition assessment, prompting a five-year inspection frequency.
Despite its age, East Side No. 3 continues to serve its primary purpose of irrigation for the surrounding area, with a normal storage capacity of 117 acre-feet. The dam's construction materials include stone core types and soil foundations, making it a vital water resource structure in the region. However, its moderate risk assessment rating suggests the need for ongoing risk management measures to ensure the safety and integrity of the dam.
The dam's location in Congressional District 00, Wyoming, underlines its importance to the local community and the need for continued regulatory oversight by the State of Wyoming's SEO agency. With Liz Cheney as the current Congressional representative, the future maintenance and upkeep of East Side No. 3 will be crucial in sustaining water resources and climate resilience in the area.
Year Completed |
1966 |
Dam Length |
725 |
Dam Height |
25 |
River Or Stream |
FIVE MILE CREEK |
Primary Dam Type |
Earth |
Surface Area |
14 |
Hydraulic Height |
20 |
Drainage Area |
0.4 |
Nid Storage |
200 |
Structural Height |
25 |
Outlet Gates |
Valve - 2 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
East Side No. 3